Included are Gershun's manuscript memoirs, entitled "Vospominanii︠a︡ russkogo advokata" (843 p.), covering the 1890s to 1918; manuscripts and typescript of a work entitled "Essai sur la Profession dʹAdvocat"; a letter; two printed items which concern Gershun, and some newspaper clippings.

The papers comprise correspondence, documents, institutional files, writings, lectures, memoirs, research notes, photographs, third party materials, printed materials, periodicals, microfilms, audio material, and digital files accrued by historian and professor emeritus of Columbia University, Leopold H. Haimson, during his professional life.

The papers consist of correspondence, manuscripts, documents, subject files, photographs, and printed materials. Correspondence in the collection includes 1 item from Ivan Bunin, 2 from Vladimir Davydov, and many from G. A. Alekseev. Mendeleev's extensive memoirs, "Svet i teni v moei zhizni," discuss his childhood and youth, government service, World War I, the 1917 Revolution and the Civil War, and life in the emigration up to 1933. Subject files in this collection concern the Prague Russian Archive, the Union of the Russian Nobility, the Russian Imperial family in the emigration, and other topics. Printed materials include an almost complete set of the weekly "Parizhskii Vestnik" (1942-1944).